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rivulus

American  
[riv-yuh-luhs] / ˈrɪv yə ləs /

noun

plural

rivulus

  1. any of several killifishes of the genus Rivulus, native to small streams of tropical America, often kept in aquariums.

Etymology

Origin of rivulus

< New Latin, Latin: rivulet

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.